woolbeet



(No ModeL) P. T. COUCH & C. W. WOOL'BERT.

GRINDING MILL. No. 317,735. Patented May 12, 1885.

UNITED STATES PATENT Orricn.

PERLEY TAPLEY COUCH AND CHARLES Vl VVOOLBERT, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNORS OE ONE-THIRD TO EDIVARD S. WOOLBERT,

OF ELMER, NEW JERSEY.

GRINDING-MILL.

SPECIFICATION forming part of Letters Patent No. 317,735, dated May 12, 11.885.

Application filed November 26, 1884. (No model.)

To all whom it may concern:

Be it known that we, PERLEY TAPLEY Conan and CHARLES W. WOOLBERT, citizens of the United States, residing at Phila- 5 delphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Grinding- Mills,of which the following is a specification, reference being had to the accompanying 1o drawings.

Our invention relates to feed-hoppers for grinding-mills of the roller class, and has for its object the provision of efficient adjustable feeding-hoppers and feeding-rolls for such] I 5 mills; and it consists in the construction and combination of parts hereinafter set forth, and pointed out in the claims.

In the drawings, Figure 1 is an end elevation of the hoppers, showing the walls of one in section. Fig. 2 is a detail of the shut-off gates. Fig. 3 is a side elevation of the parts.

Above the grinding-rolls of a mill we arrange hoppers, each ofwhich has a back board,

2, and a front board, 3, inclined and converging toward their lower ends, the board 3 being cut shorter than 2 in order to permit the operation of the feed-regulating gate II. This gate H extends the full length of each hopper 1, and is provided on its upper edge with .one or more rods, J, which project through suitable brackets, K, and hold the upper end of the gate in position. A spring, I, is placed on rod J, and bears between the gate H and bracket K, holding the former normally down and yet permitting it to be raised sufficiently to enable the removal of obstructions which are liable to get into the hopper. The lower edge extends slightly below the lower edge of the back board, 2, of the hopper, The feedroller L is journaled below the discharge of the hopper, and moves close against the lower edge of the board 2, and also against or close to the feed-gate H when the said gate is in its usual position. 3y adjusting the said gate H 5 to and from the roller the feed may be regulated, as will be readily seen. To accomplish such result, set-screws g are passed loosely I through gate H, and are threaded through board 3. A springJ', is placed on each screw 9, between board 3 and gate H, and holds said gateH out against the head of screw g. By turning screw 9 it will be seen that the gate may be set toward or from the feed-roll in order to reduce or increase the quantity of stufl' i being fed to the rolls.

The stop-feed mechanism comprises two shafts, N, journaled horizontally in the casing 1 between the two pairs of hoppers and about i midway the upper and lower ends of the same. These shafts are usually made in sections coupled at It, and are provided with similar intermeshed pinions, O, by means of which rotary motion given one is imparted in equal degree to the other. One of the shafts N is provided with a hand-lever, P, by which it 6 may be rotated, and the shut-oft gate proper] y adjusted to open or close the feed. The shafts N have crank-arms s coupled to rods T, which connect with the shut-ofi gates H. These arms T operate through slots or openings through board 2 near the bottoms of the hoppers. This, it will be seen, is a simple and convenient arrangement by means of which the feed may be instantly stopped in all four 3 of the hoppers by simply moving a single part.

In this specification a divided or double inclosure forming two hoppers is referred to. It will, of course, be understood that such is in tended to be used when double sets of rollers are used, and that only a single hopper may be used, if desired.

What we claim is- 1. The combination, with the hoppers 1, arranged parallel to each other, of the shafts N N, arranged between said hoppers and provided with intermeshed pinions 0' and arms S, therods T, connected with arms S and the shut off gates M, adapted to shut off the feed of the hoppers.

2. The combination of the hoppers having front and back boards, 3 and 2, the feed-reg ulat-ing gates H, having rods J, the springs I, the set-screws g, the springs f, and the feedrolls.

3. The combination of the hoppers, the feedrolls, the feed-regulating gates, at spring tures in presence of two Witnesses. whereby said gate is given a downward ten- PERLEY TAPLEY COUCH. sion, set-screws turned loosely through the CHARLES W. WOOLBERT.

5 feed-gate and threaded. into the hopper, and I Vitnesses:

a spring bearing between the feed-gate and SAMUEL HARTRANFT, the hopper, substantially as set forth. EDWARD S. WOOLBERT.

In testimony whereof we affix our signe- 

